12-bit SPI temperature sensor with shutdown — what the ratings mean for your BOM
The LM74CIMX-3-NS: Resolution is 12 bits, which gives you 0.0625°C per LSB — fine enough to track a thermal gradient across a board or catch a fan failure before it cooks the downstream silicon. That ±5°C boundary is the datasheet's guaranteed limit; the typical 1.25°C figure is what you'll see in the middle of the operating band (-10°C to 65°C). For a system that only needs to know if the board is 25°C or 85°C, the ±5°C guard band is fine. If you're trying to compensate a crystal oscillator or calibrate an ADC reference, budget for the wider tolerance at the extremes. The shutdown mode (listed feature) pulls quiescent current to near-zero — useful for battery-powered gear where the sensor wakes up, takes a reading, and goes back to sleep.
Supply voltage and temperature envelope — where this part lives
The operating temperature span is -55°C to 150°C — that's the full military/industrial temperature grade, good for engine-bay, downhole, or cold-chain logging.
RoHS compliance — the constraint you need to know
The LM74CIMX-3-NS is listed as RoHS non-compliant. That means it contains lead or other restricted substances above the RoHS threshold. If your BOM requires RoHS compliance for EU markets or internal environmental policy, this part does not meet that requirement — you'll need the RoHS-compliant variant (check the LM74CIM suffix options). For non-RoHS builds (military, aerospace, industrial exempt, or legacy products with a RoHS waiver), this part is a direct drop-in. The package, pinout, and electrical specs are identical to the RoHS version; the only difference is the plating and solder-ball composition.
The Bulk package format (tube or tray, not tape-and-reel) is typical for engineering samples, low-volume production, or through-hole assembly lines that don't use reel feeders. If your pick-and-place requires tape-and-reel, specify the reel suffix variant when ordering.